I've been deveoping an android app (using ChatGPT - I have no real android development knowledge!) which animates a dog's mouth through the camera feed. I had the app working okay but with some latency between the camera feed and the overlay (using CameraX and a PreviewView), so I tried to update it to an offscreen rendering approach, using an EGL context and MediaCodec surface to render the camera feed plus overlays into a single composited output.
However, the I have not implemented this correclty and the camera feed is just showing a black screen.
Here's ChatGPT's summary of what we had originally (working) and what we changed it to. Both of these approaches are saved on different github branches which you will have access to. You can see the previously working version on the master branch, and the newly updated (not working) version on a test branch.
What We Had Originally - An Android app (Kotlin) using CameraX and a PreviewView to display the live camera feed. - A BoundingBoxOverlay custom View drawn on top for YOLO pose detection (dog’s mouth, eyes, etc.). - We wanted to animate the dog’s mouth in sync with audio but were limited by the traditional overlay.
What We Changed It To Offscreen Rendering Approach: - Created an EGL context and MediaCodec surface (via OffscreenRenderer.kt) to render the camera feed plus overlays into a single composited output. - The camera feed is now provided by a SurfaceTexture created from an external OES texture (rather than using PreviewView). - CameraX is configured to output frames to that SurfaceTexture. - A custom pipeline composites the camera and any overlays (animated mouth, etc.) in OpenGL, then encodes to a video file with MediaCodec.
What We’re Trying to Achieve A Snapchat-like pipeline: - Grab the camera feed directly via a SurfaceTexture (external OES texture). - Apply real-time overlays/filters (like mouth animation, hats, glasses) in OpenGL. - Composite everything offscreen and encode it into a video file (for recording). - Avoid the performance constraints of standard Android Views by relying on OpenGL compositing (similar to Snapchat filters).
Despite these changes, the feed currently displays a black screen. We suspect an issue with the GL pipeline, resolution mismatch, or camera frames not drawing as intended.
Goal: Fix the offscreen renderer so that camera frames plus overlays appear in real time, and video recording also works as expected.
Reescritura humana de libro Category: Article Writing, Castilian Spanish Translator, Content Writing, Editing, Proofreading, Spanish Translator, Writing Budget: €12 - €18 EUR
02-May-2026 16:02 GMT
Datenmanagement & CRM-Abgleich-Freelancer gesucht Category: CRM, Data Analysis, Data Entry, Data Extraction, Data Integration, Data Management, Data Processing, Database Management Budget: €2 - €6 EUR
02-May-2026 16:02 GMT
Cross-Platform Nutella Survival Game Category: Android, Game Art, Game Design, Game Development, IPhone, Mobile App Development, Objective C, Unity Budget: $10 - $30 USD
02-May-2026 16:02 GMT
Excel Text Data Entry Category: Data Analysis, Data Cleansing, Data Entry, Data Management, Data Processing, Excel, Microsoft Office, Proofreading, Typing, Word Budget: ₹12500 - ₹37500 INR
Advanced Logo Masterclass Creation Category: 3D Animation, Adobe Illustrator, Photoshop, After Effects, Animation, Branding, Logo Design, Video Editing Budget: ₹750 - ₹1250 INR
02-May-2026 15:58 GMT
Luxury Iron Legacy Logo Category: Adobe Illustrator, Photoshop, Branding, Graphic Design, Illustration, Logo Design, Vector Design Budget: $250 - $750 USD
02-May-2026 15:57 GMT
Rep Your Team Logo Category: Animation, Branding, Creative Design, Digital Design, Graphic Design, Logo Design, Photoshop, Typography, Vector Design, Visual Design Budget: $250 - $750 USD
02-May-2026 15:57 GMT
Minimalistic Saltwater Fishing T-Shirt Design Category: Digital Art, Fashion Design, Graphic Design, Illustration, Logo Design, Photoshop, T Shirts, Vector Design Budget: $30 - $250 USD
Corporate Website Build & SEO Category: Graphic Design, PHP, SEO, Web Application, Web Design, Web Development, WordPress Budget: ₹150000 - ₹250000 INR
02-May-2026 15:53 GMT
Lead-Generating Landing Page Category: API Integration, Conversion Rate Optimization, CSS, Email Marketing, Lead Generation, Web Design, Web Development, Web Hosting, Webflow, Website Optimization Budget: £250 - £750 GBP
02-May-2026 15:52 GMT
Translate Documents to Spanish Category: Content Writing, Editing, English (US) Translator, Language Tutoring, Proofreading, Spanish Translator, Technical Writing, Translation Budget: $3 - $10 NZD
